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Floating Solar: An Emerging Opportunity at the Energy-Water Nexus

By Carlos Gamarra, Jennifer J. Ronk

Floating Solar: An Emerging Opportunity at the Energy-Water Nexus

April 22, 2019 Article, Article Vol 10, Vol 10 (2019, Vol 10 (2019)

Texas is experiencing tremendous growth, which puts pressure on resources including water and electricity supplies. Texas leads the nation in renewable energy production and is experiencing tremendous growth in the solar energy sector, with the Solar Energy Industries Association reporting that Texas is on track to become the fastest growing utility-scale solar market in the United States within the next five years. In this market, a new photovoltaic (PV) technology, floating solar, is gaining attention. Floating solar PV systems use the same types of PV panels as land-based systems, but the panels are either floating in the water (tethered to the land or substrate) or are suspended over a water body. Floating solar panels typically produce more energy than similarly-sized terrestrial systems (because of the cooling effect and reflectivity of the water). The shading provided by the solar panels can also significantly reduce evaporation and can improve water quality by inhibiting the growth of some types of algae and inhibiting bromide converting to bromate. In a climate where much of the state is arid or semi-arid and the entire state is subject to drought, a technology such as floating solar can be part of the solution. Texas reservoirs, water and wastewater treatment facilities, power plant cooling ponds, and irrigation ponds all have the opportunity to realize multiple benefits from floating solar that could not be achieved with a standard ground-mounted PV installation.

© 2019 Carlos Gamarra, Jennifer J. Ronk

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Tags: emerging energy technologiesenergy-water nexusfloating solarrenewable energy

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